Configuring a High Availability Proxmox Cluster

Introduction

This guide is a simple one, it will walk you through the process of setting up High Availability in a Proxmox cluster.

What is High Availability?

High Availability (HA) is a feature that ensures that your virtual guests are always available, even if a node in the cluster fails. When a node fails, the virtual guests running on that node are automatically migrated to another node in the cluster.

Prerequisites

A Proxmox cluster with at least three nodes Clustering Proxmox
Shared storage between the nodes Ceph Guide
A network bridge for the HA network (recommended)

Step by Step Guide

Create a HA Group (Optional)

HA groups are used to group Virtual Guests together to ensure they are started only on the nodes in the group.

Navigate to the Datacenter view.
Click on the HA drop-down menu, then click on the Groups option.
Click on the Create button.
Enter a name for the group in the ID field.
Select the nodes you want to add to the group.
You may also configure the restricted, and nofailback options as needed.
Click on the Create button.

Configure HA Resources

Click on the HA drop-down menu
Under the Resources section, click on the Add button.
In the VM field, select the virtual guests you wish to be highly available.
In the Group field, select the HA group you created in the previous step.
Configure the Max. Restart, Max. Relocate and Requested State options as needed.
Then click on the Add button.

Conclusion

Congratulations, that's it! Promox HA is that simple to configure.

Next Steps

More advanced Proxmox guides coming soon! 😊

Happy Hosting!

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